Write the hindu-arabic numeral in expanded form.
13) 15
a) (1x 10^1)+ (5 10^2)
c) (1 10^6) + (5 * 10^1)
b) (1 x 10^2) + (5 x 10^1)
d) (1 x 10^1) + (5 x 10^0)

Asmall book publisher knows that 26 books weigh 41 lbs. how much do 40 books weigh?

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required

The length of a rectangular plot of land is given by the expression 6x^3y^4. the width of the plot is given by the expression 5x^5y^4z. find an expression to represent the area of the rectangular plot.